Selling a law practice in Canada

A law practice sale is unlike most business sales in one basic respect: the law society governing lawyers in that province sits over the transaction from beginning to end, and several of the mechanics — trust funds, client files, conflicts of interest — are not negotiable points between buyer and seller so much as fixed obligations neither side can contract around. Understanding what the society controls, and what is actually left to negotiate, is the first step in planning a realistic sale.

The law society governs the sale, not just the licence

Each provincial law society sets its own rules for how a practice sale, merger or wind-down is expected to proceed, including notification requirements, restrictions on how the sale can be advertised, and expectations around the safekeeping of closed client files. These rules differ by province and change over time, so treat the law society’s current bylaws and guidance — not general business-sale practice, and not what another lawyer did in a different province — as the authoritative starting point for planning the transaction.

Trust accounts cannot simply be sold

A law firm’s trust account, holding client funds separately from the firm’s own money, is subject to strict record-keeping and reconciliation rules and to spot audits by the law society. It is not an asset that transfers with the rest of the practice; it needs to be properly reconciled, with any client funds accounted for and disbursed or transferred according to the society’s rules, before or as part of the wind-down. A shortfall or irregularity discovered here is treated seriously by regulators, and it can follow the individual lawyer responsible even after the practice itself has changed hands — confirm the trust account is clean well before a sale is announced, not once a buyer is already reviewing the books.

Client files move only with client consent

Unlike a customer list in most other small business sales, a client’s legal file generally cannot move to a new lawyer without that client’s knowledge and consent — the client, not the seller, ultimately decides who represents them going forward. This means a sale involves reaching out to clients as part of the process itself, not simply handing a filing cabinet to the buyer once the deal closes, and the buyer needs to run its own conflicts check on every file before agreeing to take it on, since a conflict with an existing client of the buyer’s firm can mean a file cannot transfer at all.

Conflicts checks shape what actually transfers

A buyer acquiring a law practice is not simply acquiring a book of clients the way a retailer acquires a customer list — each incoming client relationship has to be checked against the buyer’s existing client roster for conflicts of interest before it can be accepted, under the same professional conduct rules that apply to taking on any new client. This can mean a meaningful share of a practice’s apparent client base is not actually transferable to a specific buyer, which is part of why due diligence on a law practice purchase looks closely at conflicts exposure before price is finalized.

What happens to wills, closed files and long-term retention

Lawyers who prepare wills or hold client documents for long-term safekeeping face a specific issue when a practice is sold or wound down: those documents need to go somewhere clients can still find them, sometimes through a law society will-registry or notification service, or through an arrangement with the buyer to act as custodian going forward. Closed client files carry their own retention obligations under the society’s record-keeping rules regardless of whether the practice is sold, merged or simply closed, and working out who is responsible for that retention is a real, practical part of the deal.

Professional liability insurance and run-off coverage

Lawyers typically carry mandatory professional liability insurance — in Ontario this runs through LawPRO, and other provinces administer their own equivalent programs — and a sale or closure raises the question of run-off coverage, protecting against claims arising from work done before the sale but discovered afterward. Confirm how run-off coverage is arranged and who bears its cost as a specific line item in the deal, since claims against legal work can surface years after a file was actually closed.

Work-in-progress, referral fees and the transition

As with other professional practices, unbilled work-in-progress and outstanding disbursements as of the closing date are usually negotiated as their own item, and a written transition period where the outgoing lawyer introduces the buyer to retained clients supports better continuity than an abrupt handover. A non-solicitation covenant limiting the seller’s ability to draw former clients to a new practice is standard, though its enforceability against a lawyer depends on rules specific to the profession and should be drafted, or reviewed, by counsel experienced with practice sales rather than a generic template.